Probably a Mancini rear main seal cap but I'm not positive. The engine shop I work with does a lot of Mopar stroker motors these days and sometimes I lose track of which parts end up on which build.
I tried one of hughs engines main seal caps, couldn`t make it work w/ the studs no matter what I did. They told me I must have something weird. I told them I put the orig back on , no problems. They did reimburse my $ , good people as far as I`m concerned. Only thing is, their shipping charges are way to high.
